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Finding the Fourth Proportional to 1,679.85, 2,519.99 and 977.39

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Solution

The fourth proportional to 1,679.85, 2,519.99 and 977.39 is: 1,466.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.85 : 2,519.99 = 977.39 : x
  2. Step 2: Convert to fraction form
    1,679.85/2,519.99 = 977.39/x
  3. Step 3: Cross multiply
    1,679.85x = 2,519.99 × 977.39
  4. Step 4: Simplify right side
    1,679.85x = 2,462,995.54
  5. Step 5: Solve for x
    x = 2,462,995.54/1,679.85
  6. Step 6: Final answer
    x = 1,466.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.